package org.fengling.readingplatform.novel.utils;

import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

@Component
@Slf4j
public class CheckUtils {

    @Resource
    private RedisTemplate redisTemplate;

    public boolean checkWithBloomFilter(String checkItem, String key){
        int hashValue = Math.abs(key.hashCode());
        long index = (long)(hashValue % Math.pow(2, 32));
        boolean existOK = redisTemplate.opsForValue().getBit(checkItem, index);
        log.info("--->key:"+key+" 对应坑位下标index："+index+" 是否存在： "+existOK);

        return existOK;
    }


}
